Pressure lubrication pump



Dec. 15, 1936.'

Filed lFeb. 2l, 1935 2 Sheets-Sheet l Dec. 15, 1936. s o, JAKOBSEN 2,064,755

PRES SURE LUBR ICAT ION PUMP Filed Feb. 21, 1955 2 sheets-sheet 2 sa 61 m94.

Patented Ecc. l5 1936 PRESSURE LUBRIC'ATION PUMP Svend Older .lakobsem Hoievarde, near Haugesund, Norway lll Claims.

` The invention has for an object to present a lubricator device adapted to supply oil to individual feed pipes by individual impulses of a piston pump, utilizing a novel mechanism for effecting a selective distributing function coordinated with operation of the piston.

An important purpose is to construct a novel means for effecting connection between a supply source and a multiplicity of feed ducts.

A very important aim is to present such a structure in which the amount of lubricant supplied to Various ducts may be individually and selectively proportioned to the need of the particular mechanism or parts being lubricated by the respective ducts, and particularly to enable this by 'the use of a single pump.

A specific object is to provide means coordinated to simultaneously proportion the stroke of a pump selectively to the need of each of a number of given parts and eiect the selective connection of the necessary ducts in synchronism with the action of the pump.

Additional objects, advantages and features of invention reside in the construction, arrangement and combination oi parts involved in the embodiment of the invention as will appear from the following description and accompanying drawings, wherein Figure l is an elevation of one embodiment of the invention with parts broken away to show interior parts.

Figure 2 is a similar View at right angles to Figure l.

Figure 3 is a vertical axial section of the valve proper, and immediately associated parts.

Figure ll is an elevation of the distributor.

Figure 5 is a horizontal section on the line 5 5 of Figure 2, looking downward,

Figure 6 is a section on the line i-G of Figure 3.

Figure 7 is a diagrammatic development of the valve face.

Figure 8 is a diagrammatic development of the valve seat of the distributor.

Figure 9 is a section on the line Q-i of Figure 2 (in a plane with the individual feed duct connections).

Figure l0 is a section on the line ill-lil of Figure l.

There is illustrated a lubricator unit adapted to use for various kinds of machinery or ior other purposes, and adapted to be operated in any approved manner suitable to the particular use. It includes an outer casing it, having an upper closed head H, and a bottom including a mani- \5 told l2 which in the present showing is circular and provided with a multiplicity of radial duct connections i3 in its lower part from which tubes may be led to vario-us points of application of lubricant. The casing constitutes a reservoir for lubricant. The manifold includes a conical concentric seat i4 on which open respective discharge ports i5 from each of the duct connections. This seat portion is deepened to afford a good bearing for a step-by-step rotating distributor I6, which includes a bushing Il tting the seat I4 and having an inner conical seat parallel and concentric with the seat I4, being formed with a single radial discharge port Il' therethrough at a level with the ports I5. The distributor bushing extends above the top of the manifold bottom l2 and in this upper part is formed with two radial inlet ports l-l 9 vertically spaced and both communicating exteriorly with the reservoir space in the casing l0. The latter ports are on an element of the conical face of the seat spaced degrees from the port Il'. Similar ports I8 and i9 at the same levels are formed in the bushing diametrically opposite the ports iii-i9. Means is provided to rotate the distributor, step-bystep, so that its port Il registers successively with the ports l5 at respective stations in its movement, as will be described. Seated in the distributor bushing there is a hollow distributor valve 2i] having a coaxial tubular stem or cylinder 2l, the valve and stem being cylindrically bored to serve as a pump cylinder open only at the upper end, except for ports opening laterally from the lower end of the bore through the valve, and fitted with a piston 22 consisting of a simple solid cylinder sufficiently shorter than the bore of the valve to permit the necessary stroke as will be described. The lower end of the bore is closed except when the ports of the Valve and bushing are registered. The upper end of the bore of the cylinder 2| is closed by means of a gear 23 by which the cylinder 2| may be rotated through any usual operative connections although other means may be employed, if desired. The gear is provided with a hub 24 revolubly mounted in the head il, and above this head a crank 25 is provided on the gear hub by which it may be operated manually when or if desired. It is contemplated that the cylinder and Valve will be sustainedly rotated when in use.

The valve 2i) consists of an enlargement of the wall of the cylinder 2l, and is formed with an integral imperforate end wall 26. It is formed with an inlet passage 21 in the wall of the valve, opening inwardly at the extreme bottom of the cylinder at one end and opening outwardly on to a horizontal port 28 located in the upper part of the face of the valve on a level with the lower inlet port iii of the distributor bushing. The port 28 extends over slightly less than 90 degrees of arc on the periphery of the valve. Diametrically opposite the passage and port last described there are a similar inlet passage and port 2 and 28 respectively, having similar form, extent, and communication at the same levels. An outlet passage 29 is formed in the wall of the valve spaced ninety degrees from the passage 2l, also opening on the interior of the valve at the bottom thereof, and opening outwardly on to an outlet port 3Q extending horizontally over less than ninety degrees of arc on the face of the valve in the lower part thereof at the level of the port I1. A port 39' at the same level and of the same extent is located diametrically opposite the one 30, and -from this there leads a passage 29 opening inwardly at the bottom of the cylinder bore.

There is also formed on the face of the valve very near the top thereof a peripheral horizontal combined inlet and outlet port 3| extending over somewhat less than 90 degrees, and a diametrically opposite port 3| of similar level and extent, both positioned to register with the upper inlet port i9 of the distributor bushing, and located in sectors of the valve intermediate those containing the ports 28 and 28. The distributor bushing is also formed with a radial upper outlet port 32 located vertically above the port il and on a level with the inlet port I9. Attached to the side of the bushing there is a vertically extending pipe 33 leading from the port 32, and having a goose neck termination 34 in close spaced relation to the wall of the casing it. The casing is provided with a multiplicity of sight openings 35 immediately below the level of the upper end of the pipe and alined over respective ports and connections |-|3. The pipe is so located on the distributor that when the piston is raised the goose neck will be in iront of an opening 35 over the port l5 through which lubricant will be discharged on the next downward movement of the piston, as will be explained.

From the upper end of the interior face of the cylinder a port 36 opens into a passage 31 formed in the wall of the cylinder, extending down to a level with the port 32 of the bushing, where it opens outwardly into the port 3 l. A similar port and passage 3S' and 3l' are formed on the cylinder diametrically opposite those last named opening through port 3|. On the distributor bushing there is mounted a frame or case 38, spaced from the casing I0. Fixed on the casing l!) around and clearing the case 38 there is a horizontal stationary annular rack 39 concentric with the cylinder 2| having teeth 4D on its upper side formed with inclined cam faces 4|, all inclined in a common direction, and vertical stop sides 42, the tops 43 of the teeth being flat for a distance of approximately half the interval between teeth or less. On the frame 38 there is a rocking ring 4d having diametrical trunnions 45 revolubly engaged in the frame 3S and provided with wiper arms 4t at right angles to the axis of the trunnions extended over the rack ring and formed with under sides 41 inclined the same as and adapted to engage the cam faces 4| and by bearing downwardly thereon cause the distributor to be propelled clockwise as viewed from above. They also have properly formed stop sides 48 adapted to engage the stop sides 42 of the teeth 4Q. There is an odd number of teeth on the rack ring 39 so that when one of the arms is fully depressed, the wiper face 4'! of the opposite arm will when moved downward engage a cam face thereunder to propel the distributor one stage in its movement. The arms 46 are also so positioned relatively that when one is at the full depth oi movement on one cam face, the opposite arm will clear the ring in such spaced relation that on the next rocking movement, some lost motion will occur and the rising arm will clear the top of the next advancing tooth before or as the opposite arm engages the cam face lil thereunder, thus avoiding obstruction of the step movement. On the top side of the rocking ring lf3 close beside the cylinder 2|, there are formed strikes or cam knobs 49, arranged on a diametrical line spaced above the pivot axis of the rocking ring.

Slidable vertically on but rotating with the cylinder 2|, there is a sleeve 5i) having a single wiper knob 5| on its under side adapted to engage the knobs 49 to rock the ring 44 as will be described. This sleeve has a diametrical cross pin 52 therethrough, fixed on the piston 22, and engaged loosely through a longitudinal slot 53 in the sides of the cylinder 2|. The pin is tenoned at its ends and has mounted thereon respective wiper wheels 54 located outwardly of the sleeve 5U to be engaged by a ring cam 55 xed on the upper part of the distributor frame. The latter is formed with two diametrically opposite flats or tops 56 which are the extremes of downwardly projecting lobes 5l of the cam, and intermediate recesses 58. The ilats 56 are extended horizontally a short distance.

Between the lower side of the sleeve il and the top side of the valve 2U a helical spring 59 is coniined to yieldingly hold the sleeve upwardly against the cam so that for each rotation of the sleeve relative to the cam, the sleeve will be reciprocated twice in each direction.

It will be seen that the sleeve is moved positively downward to a definite xed limit by the cam, but means is provided to variably and adjustably limit its upward movement and consequent suction movement of the piston to adapt the pumping capacity in respect to each stage of movement so that specic quantities of lubricant predetermined, and/or variable at will, will be delivered to the respective oil ducts. This means consists of a yoke 6D, pivoted between ears 6| on the top of the cam 55 or distributor frame at one side, the yoke having divergent arms t2 extending on opposite sides of the cylinder and carrying respective wiper rolls 63 at diametrically opposite sides of the cylinder, positioned to bear on the horizontal top face of the sleeve 5) to limit the upward movement thereof according to the position o the yoke. The yoke has an upwardly extending central regulator arm 54 at its pivot base, formed with an inclined cam or wiper 65 on its outer side at its extremity, while set in the wall of the casing lil with a suitable mounting 66 there are respective regulating screws or the like over each of the ports I5, respective set screws 68 being provided to secure the screws 5l in adjusted positions. The ends of the screws 6l are suitably formed to engage and slide easily on and off the cam 65 if need be.

As the distributor is moved step by step to aline the port Il with respective ports l5, the regulator cam will engage the respective screws 5? on or after arrival at each stage, thereby limiting the upward movement of the sleeve and consequent suction stroke of the piston distinctively for each operation. The succeeding correspondingly limited downstroke of the piston will force the desired amount of lubricant through one of the ports il-Bl to the port il" from which it gains access to the particular port and conduit connection iii-i3 thenfin registry. Since there are two step movements for each rotation of the cylinder and valve relative to the distributor and only one port Il' and one port 32 discharge ports Sii-30' and 3i-3i on each side of the valve will be operative on alternate operation of the piston and distributor for discharge function. But the ports 29-28 and 3i-3I all will function for inlet function on each operation owing to the provision of diametrically opposite ports l--IB and lil-I9'.

In use, the device being mounted suitably for convenient access, operative connections being made whereby to rotate the cylinder clockwise as viewed from above, and pipes being led from respective ports l5 to particular machine elements or other parts where lubricant or the like is to be delivered, the reservoir or casing H3 is lled to an intermediate level with proper lubricant. After a short period of operation to expel air from the cylinder, ports and passages, the piston will operate to pump lubricant at both ends of the cylinder, only that from the lower end being discharged to the delivery pipes.

Assuming now, that the ring lill is positioned with one arm 46 at the lower limit of its movement and wheels 5ft just engaging the flats 56 one stage of movement of the distributor will have been previously completed and the distributor will be stationary and will so remain, with the port il of its bushing lll registered with one of the ports it while the rollers 54 complete the last part of their movement on the flats 56. The piston will be at its lowest position, having just expelled one charge of lubricant through, say, port passage 29 and port 3!) to the port ll and so to a respective point of delivery through one port i5. The piston will also have just completed intake of lubricant at the upper end of the cylinder through port 38, passage 3l and ports 3l and i9, and similarly through ports and passage 36, 3l' and 3|-|`l.

The port 3B will now be in lap position away from port lll and ports 3l and i9, 3|-|9' will also be lapped. The wiper knob 5| is in position to engage the strike knob 139 and operate the rocking ring to effect a further stage of movement of the dis ributo-r, and the wheels 54 are about to move upwardly against the upwardly sloping faces of the departing lobes. When the next movement of the distribution occurs the inlet ports 2B and 2t' of the valve will register respectively with inlet ports i8 and i3 of the bushing, and the port 3| comes intoalinement with the port 32, while port 3l remains in lap. The wiper 5| clears strike knob :i9 and leaves the distributor stationary while the rolls 54 move upward on the cam` 55. The port Il will now have been moved to register with a new port l5, the screw 6l thereover will be alined with the wiper 55 of the regulator yoke, so as to stop upward movement of the rolls 63 at the desired level to properly limit the upward movement of the piston and consequently limit the amount of lubricant which will be drawn in by the next upward stroke of the piston. Rotation of the cylinder and sleeve 5i) continuing, the wheels 5d now by pressure of spring 59 ascend on the cam until upward movement of the sleeve 50 is stopped by the rolls 63 of the regulator device, when rotation of the cylinder and sleeve continue, the wheels 5t moving horizontally clear of the cam. Oil

will thus be drawn inward through ports and passages |-28--2'l and |6'282| in a quantity exactly the same as that expelled at the top of the cylinder. The oil so expelled, passing through port 3W, passage 37', ports 3|-32 and pipe 33 may be viewed through the opening 35. Should it not be in accordance with requirements of the part to be lubricated by that taken in at the bottom at the same time, the particular regulator screw 6l may then be adjusted to effect the desired correction. This adjustment can be very easily made when the wheels 54 are depressed to their lower limits by the cam, as there is then a minimum of friction and pressure at the point of contact of screw 6l and wiper E5. In fact, due to the weight of the rolls 53 and yoke parts inwardly of the pivot at 6|, the yoke will fall to disengaged position on each downward movement of the sleeve.

As the wheels pass the medial plane of the recesses 58 of the cam the ports 28-28 are lapped, port 3B' registers with port il', and ports 3| and 3| register with inlet ports i9' and I9 respectively. Rotation vof the cylinder now carries the wheels 54 against the lobes of the cam, causing depression of the sleeve and piston, forcing lubricant out through passage 29', ports 30 and and drawing lubricant in through ports i9, 3|', passage 3l and port 36' and through ports I9', 3|, passage 3l and port 36. As soon as the ats lit are again reached by the Wheels Eli, ports 3| and 3E b-ecome lapped, for a shorttime, after which the ports 282-28 register with ports i8 and i8 respectively and port 3| registers with port 32 just as the wiper 5| engages the second knob i9 to rock the ring Ml. The distributor is now advanced another step to deliver lubricant to the next port l5 and pipe. Another intake of lubricant in the lower part of the cylinder now occurs as the piston moves upward by further rotation of the cylinder and sleeve, and lubricant is again expelled in like quantity through the pipe 33 in front of the view opening over the pipe to which the lubricant taken in at the bottom is to be discharged, and that discharge and further intake at the top will occur as before indicated, the cycle being thus continued from the point first mentioned, two such actions occurring on each rotation of the cylinder with respect to the distributor, but the actual rotation of the cylinder and sleeve being slightly more, due to the stepping forward, or precession motion, of the distributor.

It will be observed that the step-by-step action is clockwise, andl it is considered desirable to rotate the cylinder in the same direction in order to minimize friction and facilitate the rocking action of the ring 44, as will be understood, as well as avoid possibility of direct rotation of the ring by the wipers 5|. The stop faces of the teeth 40 and faces i8 ofA the arms of the ring d engage to preventl casual rotation of the distributor directly by the wiper 5| beyond the desired limit at each operation, so that the rack ring 39 and rocking ring 44 operate as an escapement.

The pump may be broadly termed an expansible chamber device, andwhile a single piston is shown in the cylinder, there are in fact two pump cylinder elements and two pistons, formed by the respective ends of the cylinder 2| and the piston 22, arranged in tandem relation. The cylinder, and distributor parts together may be termed a rotor for brief designation in the claims, and the bushing l1 may be termed a valve for the purposes of the claims.

I claim:

1. A liquid pump charge distributing device comprising a double expansion chamber pump device including means in one chamber operative for compression action while the other is operative for suction, means to operate the pump, means operatively connected with the pump including a valve operatively connected with the discharge of one expansible chamber only to distribute charges therefrom successively to a plurality of discharge points, and operatively connected to the other expansible chamber to deliver charges at respective View ports associated indicatively with respective discharge points.

2. The structure of claim 1 in which the pump device consists of tandem chambers, a common piston device therefor, the chambers having separate discharge outlets connected to said distributor device in operative association with the discharge elements and the view ports respectively.

3. A device of the character described comprising a rotor, a tandem piston pump device revoluble therewith, a piston operating member mounted on the rotor reciprocable longitudinally of the axis of the pump piston, a rotary annular cam concentric with and revoluble relatively to the rotor, means including a wiper on the piston engaged with the cam to reciprocate the piston, means to supply lubricant to the pump, a stationary case concentric with the axis of the rotor having a multiplicity of circumferentially spaced radial ports and having inlet means, a revoluble valve having ports to form communication between the inlet, the pump and said radial ports successively, and means to rotate the cam and valve in unison, step-by-step, proportioned to the spacing of the said radial ports.

4. A device of the character described comprising a rotary tandem cylinder device, tandem pistons therein, means to rotate the pistons on their longitudinal axis, a reciprocable member slidable on the cylinders and fixed to the pistons, a distributor frame revoluble on the axis of the cylinder, a revoluble annular cam thereon, wipers on the reciprocable member to travel by relative rotation on the cam whereby to reciprocate the piston, a rotary valve device including a stationary seat concentric with the axis of the pistons and having a multiplicity of ports circumferentially spaced, a distributor valve revoluble on said seat and having a main port movable to aline successively with said rst ports, and having inlet port spaced longitudinally therefrom, means to supply lubricant to the inlet port, a valve operatively connected with the piston and receiving from the pump revoluble in the distributor valve and having ports to aline with the said main port and inlet ports alternately, on respective movements of the pistons and to communicate with the pump on compression and suction strokes alternately, and intermittent means operatively connected with the reciprocable member to rotate the cam and distributor valve step-by-step to aline the said main port successively with the ports of the said seat.

5. The structure of claim 4, in which the second named valve includes two sets of ports, one set operative between one cylinder only and said main port, the Valve including a separate discharge port and the other set of ports operatively associated with the other cylinder of the pump and said separate discharge port, respective delivery ducts connected to the said circumferentially spaced ports of said seat, and observation means included with the said separate discharge port, for the purposes described.

6. The structure of claim 4, in which the said cam is positively operative on said wiper in one direction only, yielding means to move the reciprocable member in the opposite direction, and a plurality of adjustable stroke limiting devices spaced about the axis of the pistons and means on the cam device including a member to aline successively with said stroke limiting devices and having a part in the path of the reciprocating member opposed to said yielding means to be moved thereby.

7. The device of claim 4 in which said intermittent means comprises a stationary ring having teeth projected parallel to its axis having inclined cam faces in one direction circumferentially and stop faces in the other direction, a rocking member mounted on an axis fixed and diametrical with respect to the cam and arms thereon adapted to engage the cam faces on rocking movement in respective directions, strikes on the rocking member spaced from its axis of rocking and a wiper on the reciprocating member positioned to engage the strikes alternately on terminal compression movement of the piston, said cam having two lobes.

8. In a lubricator of the character described, mutually reversed cylinders, respective pistons therein rigidly connected, yielding means to move the pistons in one direction, mechanical means to move the pistons in the opposite direction, a distributor device comprising an annular stationary manifold and a step-by-step rotating distributor valve device having inlet relation to one cylinder for delivery of charge therefrom to successive ports of the manifold, said rotating distributor having an observation discharge device positioned thereon for observation and having means in receiving relation to the other cylinder constructed to deliver therefrom to said observation discharge device, means to operate the distributor step-by-step in unison with the compression stroke of the piston in said cylinder, a movable stroke limit device mounted on the rotating distributor having one part movable radially of the distributor and another movable longitudinally with respect to the pistons, a member xed with the pistons in the path of the second named part of the stroke limit device, and respective radially adjustable xed regulator devices spaced circumferentially of the orbital path of the stroke limit device adjacent respective ports of the manifold.

9. A device for the general uses indicated comprising a casing and reservoir element having a conical seat in its lower part and a multiplicity of radial ports opening therefrom, a hollow valve revoluble in said seat and having discharge ports, at least one arranged to register successively with the radial ports, and inlet ports communicating with the reservoir, a revoluble tandem cylinder device revoluble on its longitudinal axis having a concentric valve head thereon revoluble in the hollow valve and having separate inlet and discharge means operative with respective cylinders and arranged to deliver to said discharge ports respectively, a framing on the hollow valve, an annular cam thereon around the cylinder having two lobes extended longitudinally of, the valve and cylinder in one direction, a sleeve slidable around the cylinder having a wiper mounted thereon arranged to travel on the cam and connected to the piston to move in xed relation to the piston, resilient means confined between the framing and sleeve to bear the wiper against the cam, means to rotate the framing and hollow valve step-b-y-step for the purpose described, a yoke pivoted on the said framing having an arm projected -transversely in the path of the sleeve and having slidable bearing thereon, said yoke having an arm extended longitudinally with respect to the sleeve, and a plurality of radially adjustable xed stop devices alined with respective positions of the last named arm under stepby-step movement of the framing.

10. The Structure of claim 9 in which said stop devices are mounted on said casing at an upper part, a discharge tube being extended from one of said discharge ports of. the hollow valve to an elevated point Within said casing, sight openings being formed in the casing alined with respective radial ports at the level of the discharge end of said tube. o

ll. The structure of claim 9 in which a stationary annular rack ringis fixed in the casing around said framing formed With teeth inclined in one direction, a rocking ring around the cylinder on the framing having swinging arms over the rack ring to engage the teeth alternately as an escapernent device, strikes on opposite sides of the rocking ring spaced above its rocking axis and a wiper on said sleeve arranged to engage the strikes, the lobes of said cam having their major projections over the said rocking axis.

SVEND OLDER JAKOBSEN. 

